The thesis of the book is essentially this: Women don’t occupy as many executive positions as they could because they hold themselves back. They prefer to be liked rather than powerful.

“As a man gets more successful, he is better liked by men and women, and as a woman gets more successful, she is less liked by men and women,” Sandberg told NPR. “But I want to be clear: I am not saying that men are too self-confident. That’s not the problem. The problem is that women aren’t self-confident enough.”